Well here is the first effort that produced images:
It is a bit overexposed due there being a lot of ambient light, this was 28 mm, F 2.8, 20 second exposure, ISO 3200. The focus isn’t good either so I’m going to work on that too. I’m thinking for the next attempt I will try cutting the exposure time and the ISO in half. And I’ll spend some more time in the setup phase on getting the focus right, just have to get used to working with the camera in the dark.